“Analisis Nilai International Roughness Index (IRI) untuk Pemrograman Preservasi Jalan Nasional di Sulawesi Utara” (2025) Journal of Engineer Professional, 1(1), pp. 29–32. Available at: https://ejournal.unsrat.ac.id/v3/index.php/jep/article/view/61354 (Accessed: 14 October 2026).